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Gold/poly(o-aminophenol), gold/poly(p-phenylenediamine) and gold/poly(o-phenylenediamine) nanoparticles as well as preparation method and application thereof

A technology of poly-o-aminophenol and poly-o-phenylenediamine, which is applied to agglomerates, can solve the problems of difficult purification, small molecular weight, poor reproducibility of detection and analysis methods, etc., and achieves the effect of simple method.

Inactive Publication Date: 2015-11-11
CAPITAL NORMAL UNIVERSITY
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  • Abstract
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AI Technical Summary

Problems solved by technology

These electrochemically active substances have a single signal peak, but their molecular weight is small, and it is difficult to further purify. They are usually combined with carbon materials, noble metal particles, or magnetic materials to form composite particles for electrochemical analysis, which results in cumbersome experimental procedures and increased costs.
In addition, when detecting multiple analytes at the same time, various electrochemically active substances with distinguishable electrochemical signals are required, but the electrical signals generated by ferrocene and its derivatives are indistinguishable from those of Prussian blue. , the electrical signals of thionine, toluidine blue, and methylene blue cannot be distinguished from each other, so simultaneous detection of three or more analytes cannot be achieved
Although Cu 2+ , Zn 2+ , Pb 2+ 、Cd 2+ Such metal ions can produce a single, distinguishable electrical signal from each other, but metal ions are biologically toxic, and the detection and analysis method constructed has poor reproducibility, thus restricting its application in bioelectrochemistry

Method used

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  • Gold/poly(o-aminophenol), gold/poly(p-phenylenediamine) and gold/poly(o-phenylenediamine) nanoparticles as well as preparation method and application thereof
  • Gold/poly(o-aminophenol), gold/poly(p-phenylenediamine) and gold/poly(o-phenylenediamine) nanoparticles as well as preparation method and application thereof
  • Gold/poly(o-aminophenol), gold/poly(p-phenylenediamine) and gold/poly(o-phenylenediamine) nanoparticles as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Preparation of gold / poly-o-aminophenol composite nanoparticles

[0028] Add 1mL of 0.1M hydrochloric acid to 3mL of ultrapure water and 0.5mL of ethanol solution, then add 5mg of o-aminophenol, and stir at 20°C for 1h. Then, 970 μL of 2% chloroauric acid was quickly added, reacted for 4 hours, the product was centrifuged, and washed with ultrapure water.

[0029] 2. Preparation of gold / poly-p-phenylenediamine composite nanoparticles

[0030] Add 2mL of 0.5M citric acid to 3mL of ultrapure water and 3mL of ethanol solution, then add 5mg of p-phenylenediamine, and stir at 30°C for 1h. Then, 970 μL of 2% chloroauric acid was quickly added, reacted for 4 hours, the product was centrifuged, and washed with ultrapure water.

[0031] 3. Preparation of gold / poly-o-phenylenediamine composite nanoparticles

[0032] Add 1mL of 1M hydrochloric acid to 5mL of ultrapure water, and then add 5mg of o-phenylenediamine, thus restricting its application on sensors. Stir for 10 min....

Embodiment 2

[0034] 1. Preparation of gold / poly-o-aminophenol composite nanoparticles

[0035] Add 3mL of 1M hydrochloric acid to 6mL of ultrapure water and 9mL of ethanol solution, then add 2mg of o-aminophenol, and stir at 20°C for 45min. Then, 6.45 mL of 3% chloroauric acid was quickly added, reacted for 4 hours, the product was centrifuged, and washed with ultrapure water.

[0036] 2. Preparation of gold / poly-p-phenylenediamine composite nanoparticles

[0037] Add 6mL of 1M citric acid to 1mL of ultrapure water and 1mL of ethanol solution, then add 5mg of p-phenylenediamine, and stir at 20°C for 1h. Then, 6.45 mL of 3% chloroauric acid was quickly added, reacted for 4 hours, the product was centrifuged, and washed with ultrapure water.

[0038] 3. Preparation of gold / poly-o-phenylenediamine composite nanoparticles

[0039] Add 2mL of 1M hydrochloric acid to 8mL of ultrapure water, then add 5mg of o-phenylenediamine, and stir at 40°C for 10min. Then, 6.45 mL of 3% chloroauric acid w...

Embodiment 3

[0041] 1. Preparation of gold / poly-o-aminophenol composite nanoparticles

[0042] Add 2mL of 0.5M hydrochloric acid to 2mL of ultrapure water and 3mL of ethanol solution, then add 2mg of o-aminophenol, and stir at 30°C for 45min. Then, 3.87mL of 10% chloroauric acid was quickly added, reacted for 4h, the product was centrifuged, and washed with ultrapure water.

[0043] 2. Preparation of gold / poly-p-phenylenediamine composite nanoparticles

[0044] Add 1mL of 0.5M citric acid to 1.5mL of ultrapure water and 1.5mL of ethanol solution, then add 2mg of p-phenylenediamine, and stir at 30°C for 1h. Then, 3.87mL of 10% chloroauric acid was quickly added, reacted for 4h, the product was centrifuged, and washed with ultrapure water.

[0045] 3. Preparation of gold / poly-o-phenylenediamine composite nanoparticles

[0046]Add 1mL of 0.5M hydrochloric acid to 2mL of ultrapure water, then add 2mg of o-phenylenediamine, and stir at 30°C for 10min. Then, 3.87mL of 10% chloroauric acid wa...

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Abstract

The invention discloses gold / poly(o-aminophenol), gold / poly(p-phenylenediamine) and gold / poly(o-phenylenediamine) nanoparticles as well as a preparation method and an application thereof. O-aminophenol, p-phenylenediamine and o-phenylenediamine are oxidized and polymerized by use of chloroauric acid respectively, to prepare a novel conductive composite nanomaterial having electrochemical activity; the preparation method of the composite nanomaterial is mild and easily controllable in preparation conditions, and simple and fast in preparation process; the gold / poly(zero-aminophenol), gold / poly(p-phenylenediamine) and gold / poly(o-phenylenediamine) composite nanoparticles possess single and differentiable electrochemical signals respectively, are high in electrical conductivity and large in specific surface area, and contain functional groups such as an amino group and an imino group; the composite nanoparticles can be taken as a good electrochemical sensing material and have wide application prospect in the field of electrochemical detection and analysis.

Description

technical field [0001] The invention relates to novel electrochemically active nanoparticles of gold / poly-o-aminophenol, gold / poly-p-phenylenediamine and gold / poly-o-phenylenediamine and a preparation method thereof. The composite nanomaterial has electrochemical activity and can produce a single , Differentiable electrochemical signals, good conductivity, with functional groups such as amino and imino groups, can be used for electrochemical detection of analytical objects in water, urine, serum, and the atmosphere. The invention belongs to the field of bioelectrochemistry and can be used for electrochemical analysis and detection. Background technique [0002] Electrochemically active substances play an indispensable role in the field of electrochemical detection and analysis. It can generate redox chemical signals, which can be converted into measurable electrical signals by electrochemical instruments, thereby realizing electrochemical component analysis. The currently f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B1/00B82B3/00B82Y30/00B82Y40/00G01N27/26G01N33/574
Inventor 马占芳王丽媛
Owner CAPITAL NORMAL UNIVERSITY
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